Polishing machine



Sept. '30, 1924.

R. F. sALlsBuRY POLISHING MACHINE Filed Aug. 21,

1920 9 Sheets-Sheet l witness 30 1924. 1,509,904 R. F. SALISBURY PoLrsHING MACHINE Filed Aug. v21 1920 .ijf

, OJ .92 iff 9 sheets-shea 2 .91 MZ. 3f

90 v I l l-l:

df ff- Sept. 30 1.924.

R. E. sALxsBURY POLISHING MACHINE 9 Sheets-Sheetv 3 Filed Aug. 2l 1920 l'sept'. 3o, +924. 1,509,904

R. F. SALISBURY POLISHING MACHINE Filed Aug. 21, 1920 9 Sheets-Sheet 4 www0@ Sept. 30, i924. R. F. SALlsBURY POLISHING MACHINE Filed Aug. 2l, 1920 9 Sheets-Sheet 6 Wit/naso II'Sepi. 30, 1924.

1,509,904 R. F. SALISBURY POLISHING MACHINE Filed Aug. 2l, 1920 9 Sheets-Sheet 7 Wbb-nwo BN Sept. 3o, 1924. 1,509,904

R. F. SALISBURY POLISHING MACHINE Filed Aug. 21 l 9 Sheets-Sheet 8 Sept. 30, 1924. 1,509,904

R. F. sALlsBuRY POLISHING MACHINE Filed Aug. 2l. 1920 9 Sheets-Sheet 9 rlfgg.

,zr/712, l I sd l I Patented Sept. 30, 1924.

UNITED STATES 1,509,904 PATENT OFFICE.

ROBERT F. SALEESBURY, OIF' NEW KENSINGTON, PENNSYLVANIA, ASSIGNOR TO ALUMINUM' GOMPANY OF AMERICA, 0F PIT'EBURGI-I, PENNSYLVANIA, A COR- PORATION' 0F PENNSYLVANEA.

POLISHING MASI-BENE.

Application 'l'ed August 21, 1920. Serial No. l05,003.

Tol miler/7mm t may' con-cerro Be it lnovvn that I, ROBERT F. Siemelanin?,r

a citi-Zen of the` United States, residing, at New Kensington, in the county o fest moreland and State of Pennsylvaniay have invented a new and uisctul Polishing Machine, oi which the following isa specification,

rihis invention relates to a devioef espe ciallfy designed for use in polishing metal articles such as coo-'hing utensils and tlieltike, onel of the objects' ef the invention being` to providel simple and compact mechanism adapted to be placedadjacent a polishing Wheel or' the usiral ferm and which is, constantl'y under the control of. the operator who, by manipulating certain levers prozvided for that purpose,- can shift the device so as to cause ali parts of a straight, curved or irregular sur'aeex to be brought properly into contact with the polishing or busliing element.

A further object is to provide a device of 'thisy characterl which is normally locked away from the baiting Wheel but which can be shifted read-ily s0- that the arti-olea being treated ivizlll beheld by gravity against said wheel.

A stillE further object is: to provide mechanism whereby the article* being treated can he rotated either in: the same direction as or oppositely' to= the polishing' or buling Wheel and canI be held stationary relative toi the longitudinal axisofli said Wheel or can' be reciprocated baell: and forth upon: the Wheel daring the rotation oif the parts."

Another'objeet is-*toprovirdea simple form oft holding dfevice` 'for' properly retaining the article on the device during the polishing or bufiing action,` `s aid hol# t; 4device being easily sliiftable so= as to permit the article to be quickly placed in or remo-ved from. the device.

ihnother` object is to provide pneumatica'l-ly' controlled means whereby shallow arti.- cles, sut-li as utensil covers andi thek like, can be held securely on the device during the polishing or buiiiug operation.- said means being'l eas-illy' controlled for the purpose off gripping the article -or' quickly releasing it.

Amother object is toA combine With a pol'- ishing appara-tus ei ordinary forni, two deL vices oii the particular construction covered by this application, one machine being locatedeaclliend thereof sa that one operator can take care' ofi? both, it thus being possible to apply' and adjust one article on one device Whilethe article previously applied tothe other device isv being polished.

A farther objie'ct is to provide simple and e'iiicien't mechanism for transmitting motion to tite devices from an overhead shaft and Without interfering with the various movements of the mechanism..

Another object is to provide the device with an' attachment whereby/an article can Vbe rotated in a plane parallel With.` the axis ort' rotation of the buiiing Wheel', thereby to allow for' the polishing.' of covers and the like..

stili. further object is to provide a compact arrangement of gears so housed as to loe capable of running in oil, thereby reducing Wear' to the minimum.

With the. foregoing' and: other objects in view', the invention consists of certain novel details construction; and combinations of parts hereinafter morey fully described and pointed out in the claims, it being: u=nderstood that various changes' may be made in the construction and arrangement of the parts Without departing' from the spirit of the invention as set forth inV the appended claims;

In! the accompanying drawings the preferred forms odi the invention havev been shown..

In' said drawings'- Figure i is a front elevation of the device, the a vjacent end portion of a standard polishing wheel bein-gt4 shown by dotted lines.

liligur 2' is an; elevation. off the left side of the device as viewed in Figure laaportion-oi the coi'u'iterbalance lever being broken away and positioned above and adjacent said? lever, and the polishing` Wheel' being indicated generally by dotted lines;

Figure 3@ is air enlarged section through the s "diable, head.)A said section being` taken on line' 3v-3, Figure 1: and shmving the spindle housing: inl elevation.

liigure di is auf enllrged section on line 1li-4r Figui-eA 1:, the adij'ustablev crank oi the reciproeating,` mechanism and the housing` therefor' being'. removed.,

Figure 5- is a sectionon'- line 5 5, FigA ure 3.

Figure 6 is a section ou lliue G'-6, Figure 31..

Figure E an elevation of the overhead drive shaft and its hangers used for the purpose of operating two devices at the respective ends ofy a polishing apparatus.

Figure 8 is a vertical section through one of the hangers on line 8 8, Figure 7 and showing the telescopic shaft depending therefrom.

- Figure 9 is a section on line 9 9, Figure 8. Figure 10 is an elevation of a port-ion of the device and showing a modified lever arrangement for controlling the connection between the adjustable crank of the reciprocating mechanism and the drive shaft.

F igureA 11 is a horizontal section through the spindle housing and showing adjacent parts of the device in plan, there being an angle attachment coupled to the spindle.

Figure 12 is an enlarged section through the controlling valve of the pneumatic gripping mechanism.

Figure 13 is an enlarged view showing the flexible hose and its connections.

Referring to the figures by characters of reference 1 designates a base plate adapted to be'bolted or otherwise fastened to the floor adjacent one end of a standard polishing `apparatus such as has been indicated --there will be one plate 1 adjacent each endV of the apparatus. As both of these plates and the devices mounted thereon are of the same construction it will be necessary to den scribe and illustrate one of them only.

Formed on or secured to the plate 1 are parallel guide ribs 2 which overhang laterally extending flanges 3 projecting from the sides of a hollow base 4 mounted tcslide upon the plate 1. VAn ear 5 is formed within the base 41 and constitutes a bearing for an adjusting screw 6 one end portion of which is swivelled within an end flange 7 depending fromthe base, said screw being held against longitudinal movement relative to the base by collars 8 at opposite sides of the flange 7. The projecting end of the screw 6 is preferably made angular as shown at 9 so that by applying a wrench or other suitable tool thereto the screw can be rotated in the base. Transverse ribs 10 are formed on or secured to the plate 1 and mounted between these ribs and secured to the base 1 is a block 11 engaged by the screw 6 which extends through it. Thus it will be seen that by rotating the screw the base 4t can be shifted bodily toward or from theaxis of rotation of the wheel 7 and will carry with it the entire device mounted thereon.

Extending from the base 4L is a standard 12 located adjacent one end of the base, and laced ears 13 are carried by the base near its other end. A pivot pin 14 connects these ears and extends through the lower end of a pedestal 15 to the upper end of which is bolted or otherwise secured a concentric circular rack 16. An opening 17 extends through the pedestal near the upper end thereof and swivelled within this pedestal between this opening and the opposed sides respectively of the pedestal are pins 18 and 19 respectively. The pin 19 has a head 2() at its outer end in which is secured one end `portion of a link 21, said lilik being held securely to the head by nuts 22 engaging the link at opposite sides of the head. Said link is pivotally secured, as at 28, to one arm of a bell crank lever 24 which is pivotally mounted on the upper end of the standard 12. The other arm of this bell crank lever extends downwardly and carries a stop screw 25 adapted to come against the standard 12 so as to limit the movement of the bell crank lever in one direction. This screw 25 can be so adjusted as to Contact with the standard 12 when the pivot point 23 is slightly below the dead center, thereby to prevent the pedestal 15 and the parts carried thereby from swinging to the left toward the apparatus L as viewed in Figure 2. A sleeve 26 is carried by the bell crank lever 2a and has a lever 27 adjustably mounted therein, there being a counterbalancing weight 28 on one end of the lever.

The pin 18 has a head 29 at its outer end in which is slidably mounted a rod 3() one end of which is downturned and secured within the head 81 of the pin 32 on which the bell crank lever 24 is pivotally mounted. The free end portion of the rod 30 is screw threaded and is engaged by a nut 313. A coiled spring 311 is mounted on the rod between the nut 33 and the head 29 and, when the pedestal 15 is locked in upstanding position, as shown in Figure 2, this sprin'v is under compression. When the upper en of lever 27 is pulled upwardly the pivot point 28 is elevated above the dead center :and spring 34 is promptly released so as to thrust against the head 29 and swing the pedestal 15 laterally or backwardly toward the wheel lV. The movement of lever 27 by the operator is facilitated by the weight or counterbalance 28.

The pedestal 15 is provided at its upper end with a head 35 which projects above the circular rack 16 and is concentric therewith. This head is mounted for rotation within the pedestal and carries a dove-tailed guide 36. A slide 37 is mounted for reciprocation on this guide and the said guide together with the slide and the parts carried thereby can be readily rotated relative to the pedestal 15 by means of a handle 38 which is fixedly connected to the guide and extends upwardly and outwardly therefrom. A hand lever 39 is pivotally mounted on the handle 38 and is CII connected by a rod 40 tof a gravity latch 41 adapted to drop into any one of the notches in the circular rack 16. It will be apparent that by pulling upwardly onthe lever 39* the latch 4l can be disengaged from therack 16 and the guide 86I and the slide 37' can be easily rotated about the axis; ofy they pedestal 15 by mean-s of the handle 381.

Formed upon the slide 37 is a housing 42 in Which is journaled a transverse shaft 43 provided With a Worm gear 44. @ine end of this shaft projects laterally beyond the housing 42v and is keyed or otherwise secured to a crank arm 45 having a longitudinal slot 46. A. Wrist pin 47 is adjustably mounted Within this slot andi is pivotal'ly connected to a pitman A sleeve 49 is mounted on this pitman and is held adjustably thereto by clamping one end of the sleeve, which is split, upon the pitman as shown at 50 in Figure l. Both ends ofthe sleeve are closed and projecting into the sleeve is an ear indicated by dotted lines'- at 5l on which the sleeve vvill slide. Springs 52 are arranged Within the sleeve at opposite sides of this ear 5l. Thus it will be seen that during the rotation of the crank arm 45 the pitma-n 48, which is yield-ingly anchored tothe ear 5l on the lever S8 Will cause the slide 37 to reciproca-te upon the guide 362 Obviously by adjusting the Wristpi'n 47` in the slot 46 the extent of' this reciprocatingmoti'on can be regu-lated. A guard or casing 52 serves to house the crank ar1n 4'5- and this casing may be provided with a slot 53 whereby access can be had to the Wrist pin- 4'7 for the purpose of adjusting it. A slide 54 may be employedfor closing this slot. l

The Worm gear 44 on shaft 43 mes-hes with a vvorm 55 carried by a spool 56. See Figure 5-. This spool is loosely mounted on a vertical shaft 57 which extends upwardly througlr and? beyond the casilng 42 and also through a boss l58-extending i-ntothetopof the eas-ing 42 fromr the bottom of a head 59. This head iis mounted for rotation on the casing 42 and has flanges 60 provided With arcuate slots 61 (fsee Figure 11), into which extend clam-ping bolts 62. By loosening these bolts the head 59 can be rotated With the boss 58 constituting its pivot. The shaft 57' projects entirelyl through the head and is adapted toI be dTivenAi-n the manner hereinafter pointed out.

The spool 5G is provided' at one end with a elutch member 63 adapted tol be engaged by another- 'clutch member 64 which is feathered on the shaft 57 so--as to rotate therewith. A split collar 65 embraces the clutch member which is free to rotate therein. Thiseollar has oppositely extending projections 66 engaged by a fork 67.

This fork is carried by a transverse shaft 68 j ournaledfinthe casing 42 close to the top of said casing anda levert@ is: connected to one of the projecting ends of this shaft. A notched wiin'g 7 0- rotates with this lever and is frictionialfly engaged the end portionV of a spring 7l attached to the outer surface of the housing casing 42'. Thus, as shown. especially in Figure 6, the lever 69S will' beheld in either of two; positions by the spring 7l. Then the lever is in one position the clutch member 64 is shifted downwardly into engagement with the-clutch member so as to couple the spool 56 to the shaft 57. Then the lever 69 is in its other position the tivo clutch members are uncoupled. For the purpose of locking the spool 56 against rotationy While the clutch members are uncoupl'ech an arm 72 is secured to the shaft 68 and carries a spring pressed locking pifn 73. so positioned that when the fork 67 israised to uncouple the clutch members, the arnr 7 2 is swung inwardly to project they pin 73 into engagement with the clutch member G3i. During the movement of thelever (59* to hrilng the clutch members into engagement with each other the pin- 73. is shifted away from the clutch member 63.

Feathered on the shaft 57 andl Within the head 59? isa sleeve 7:4- to theA end portions of which are secured oppositely disposed bevel gears 75 andi' 76%. The sleeve 74 rotates within a split collar 77 and this collar, in l turn, is held against rotation by a fork 78 which engages projections 7 9.5 extending in opposite directions from the collar. This fork is secured to a shaft 80- extending transversely through the head 59T and' provided at one end With a lever 8l whereby the shaft can be rotated in either direction for the purposeof shift-'ing the sleeve 74 upwardly or downwardly on the shaft 57 Whifle rotating therewith.

The head 59 is provided onj one side With a hollow extension 82 arranged above asubstantially' conicalspindle housing 83'. A transverse shaft 84 is journaled in the extension 82 and above the spindley housing and secured to the inner end of this shaft 84 is a bevel gear 85 disposedy between the gears 75 and 7G. Thus it will be seen that when lever 8l ismoved toone exterme posi:- tion the gear 76 willi be brought into mesh With the gear 85 Whereas when the lever is moved to its other extreme position' the gear 75 will be brought into mesh With gea-r 85. Zhen lever 81 is in its intermediate or neutrallposition neither of the gears 7 5 and 76' Willt mesh with the gear 85 and, consequently, the sha-ft 84 will notbe operated.

SecuredE tothe shaft 84 and within the extension 82 is a Worm gear 86- vvhi'ch constantly meshes with a worm gear 87 secured to a spindle 88 which extends longitudinally witliin the housing 88- V.and has a screw threaded end 89 projecting from one end of said housing; This tlireaded end, under or'- duary conditions, is adapted to ei'igagef a block to be inserted into the article to be buifed or polished although, under some conditions, and as will be hereinafter explained, itcan be used in connection with a right angle attachment.

Formed in the upper end of the extension 82 is an angularrecess 90 and mounted on the head 59 and. extending over this recess is a clamp 91 adapted to be held to the head 59 by an adjusting nut- 92 engaging a threaded stem` 93. A rod` 94 which is angular in cross section is adjustably held in the recess 90 by the clamp- 91 and that end portion of the rod remote from the clamp is made round and is screw threaded as shown at 95. A collar 96 is secured to the rod and has a rib 97 on one face adapted to project into a groove 98 formed in one end of a Ysleeve 99. A spring 100 is mounted on the rod and bears against this sleeve so as to press it against theicollar 96. Nuts 101 engage the rod and constitute means for regir lating the compression of the spring 100. A hanger 102 extends from the sleeve 99 and has a small shaft 103 journaled therein and provided with a screw threaded head 104 to which is detachably secured a back block 105. The center of this block is in line with the axis of the spindle S8 when the hanger 102 is in its normal position. By pulling the hanger 102 against the spring 100 the sleevev 99 can vbe disengaged from the rib 97 Vand said hanger 102 with the block 105 can be swung laterally so as to allow a utensil or other article to be placed on the holding bloc-kV (not shown) carried by the threaded end 89 of the spindle.

Byjloosening the clamp 91 the rod 94 can be shifted longitudinally so as to adjust the back block 105 to the article to be polished. A hanger 106 in the form of a housing is adapted to be suspended at a suitable point above the device and forms a bearing for a drive shaft 107 carrying a pulley 108. This .pulley is fixedto the shaft and it is to be understood that, if desired, a loose pulley can also be mounted on the shaft to support the 'drive belt (not shown), when it is not desired to operate the shaft 107. Mounted on that portion of the shaft 107 within the hanger 106 is a worm 109 which meshes with a worm gear 110 secured to a vertical c shaft 111 j ournaled in the bottom portion of the hanger. A universal joint 112 connects this shaft to one end ofan extensible shaft 113. Thisextensible shaft includes a sleeve 114 in which is feathered a shaft section 115 connected by a universal joint 110 to the upper end of the sh aft 57. As it is intended 'to use two devices, one located at each end shaft 107 through extensible shafts to the respective devices.

In using the device a chuck or holding block suitable for the work to be polished is placed on the threaded end S9 of the spindle and the rod 94 is adjusted so as to cause the block 105 to exert suiieient pressure on the bottom of the work to hold it on its block or chuck. By means of the gearing shown in Figure 4 the work can be caused to rotate either with or opposite to the polishing wheel lV. If the polishing wheel is of a width equal to or greater than the side of a cylindrical piece of work it will not 'be necessary to operate the crank arm and the same can be left uncoupled. lf. however, the work is of such size that the polishing wheel will not extend the full length of the side thereof, the crank arm 45 can be coupled up as hereinbeforc described so that the slide 37 will. 'reciprocate und cause the work to more hack and forth across the polishing wheel with which it contacts. The extent of this rccijnocation can be controlled by means of the adjustable Wrist pin 47. For the purpose o!" bringing the work into proper relation with the polishing wheel should it be found that the work is too far to the left or too the right of the wheel the split portion ot' sleeve 49 is provided. The clamp at .50 is first loosened, pitman 48 is moved to the proper position in sleeve 49 and clamp :it 50 is then tightened on pitman 48. This controls the position of the reciprocatingr parts longitudinally. The manner of brin;rn ing the work against the wheel has already been described, such operation being effected by manipulation of the lever 27.

Should the work have a curved side wall to be polished the slide 37 can be shifted so that the center of the curve of the side wall on the work will be approximately over the center of the pedestal 15. After the mechanism has been coupled so as to cause the work to rotate the operator can grasp the handle or lever 27 in one hand and the handle 38 in the other. By then lifting the latch 41 the head can be moved about the center of the pedestal and at the same time the operator can move the lever 27, thus to give the work a compound movement which will insure the polishing of al] portions of the curved surface being acted on. If the work has a cylindrical'or tapered formation in addition to the curved surface said portion can be polished either before or after the polishing of the curved surface.

When it is desired to polish the bottom of an article it is preferable to use an angle attachment such as shown particularly in Figure 11. This angle attachment includes a base 117 adapted to be fustcnel to the casing 42 or to the slide :S7 and arlso ranged on the base are bearings 118 carrying a transverse shaft 119. A gear 12() is secured to this shaft and meshes With a gear 121 secured to the threaded end 89 of the spindle 88. The chuck or block to which the work is to be connected is fastened to the threaded end 122 of shaft 119 and by causing the slide 37 to reciprocate the Work can be rotated about an axis at right angles to the axis of rotation of the Wheel 1V and, at the same time, can be moved back and forth across said Wheel.

Vhere a shallow article is to be polished, such as a utensil cover, it is a difiicult matter to provide a chuck which will hold it properly in position. ,Under these conditions an air passage 123 is formed in the shaft 119 and a suctionphead, not shown, is adapted to be fastened to the threaded end 122 of the shaft. The other end of the shaft opens into a valve casing 121 and in this casing is arranged a tubular Hoating member 125 having each end open and which is held against rotation by a pin 126. See Figure 12. A tapered valve 127 is mounted in the casing and this valve, as well as the floating member 125, is held to its seat by a spring 128. Valve 127 has an angular passage 129 which constantly communicates With the interior of the member 125 and is adapted to move into and out of communication with a suction port 130. A lever 131 is connected to the valve and is adapted to be moved to either of two positions so as to bring the passage 129 either in communication with the exhaust port 130 or with a vent indicated by dotted lines at 132. Lever 131 has a Wing 133 extending therefrom and provided with spaced lugs 134E adapted to come against a. stop projection 135 on the valve casing. Thus the movement of the lever and its valve is limited.

A nipple 136 extends fromv the port 130 and has one end of a flexible hose 137 clamped upon it. The other' end of this hose receives a tubular stem 138 one end of which bears against a rounded extension 139 on a nipple 140 adapted to extend from a suction pipe not shown. A coupling 141 engages this nipple and serves to clamp the tubular member 138 against the rounded extension 139.

By manipulating the valve 127 a suction can be established through the passage 123 so that When an article is placed against a suction head on the end 122 of shaft 119 said article will be gripped tightly during the polishing` operation. In ord-er to release the article it is merely necessary to rotate the valve so as to cut ott the suction and place the passage 129 in communication With the outlet 132.

vWhile the clutch operating shaft 68 is preferably operated by the lever 69, as. hereinbefore described, it is to be understood that, if desired, a lever 142 can be extended from said shaft as shovvn in Figure 10 and placed in engagement with a notched rack 143 extending upwardly from the slide 37.

1t will be noted that the various gears are contained Within closed housings which can be filled Withalubricant so that the parts Will operate without objectionable friction. By providing` tivo devices such as described one operator can handle both of them, it being possible to remove a polished article from one device, replace it with another, and adjust the device to the polishing wheel while another artic-le is being acted on by the polishing Wheel at the other end of the apparatus.

What is claimed is:

1. The combination With a polishing wheel, of a Work holding device having a portion tiltably mounted, a standard, pivotally connected members constituting a toggle and connected to the standard and tiltableV portion of the device for holding the device normally against movement, means under the control of the operator for shifting said members out of normal positionand resilient means for automatically tilting the tiltable portion of the device toward the Wheel When the members are shifted from normal position.

2.v The combination With a polishing lathe, of a Work holding device having a portion tiltably mounted, pivotally connected members constituting a toggle for holding the machine normally against movement, a counterbalance lever connected to one of said members, and spring operated means for automatically swinging the tiltable port-ion of the device'toward the lathe when the members are moved out of normal positions.

l3. The combination With a polishing lathe, of a base, means for sliding said base relative to the lathe, a work holding device having a portion tiltably mounted on the base, a standard on the base, pivotally connected members constituting a toggle joining the device to the standard, adjustable means for controlling the movement of said members in one direction .With their point of connection past the dead center, means under the control of an operator for shifting said members, and yielding means for automatically swinging 'the tiltable portion toward the vlathe when said members are shifted.

1. A Work holding device for use in connection with polishing lathes, including a base having an upstanding portion, a pedestal tiltably mounted on the base, a lever fulcrumed on the Yupstanding portion, a link connecting said lever to the pedestal, adjustable means carried by the lever for limiting its movement in one direction, and

Y an operating lever connected to the first mentioned lever.

5. A work holding device for use in connection with polishing lathes, comprising a pedestal tiltably mounted, a bell crank lever, a support for said lever, a link connection between one arm of the bell crank lever and theV pedestal, means cooperating with the other arm of the bell crank lever for limiting the movement thereof in one direction, and ank operating lever adjustably connected to the bell crank lever.

6. A work holdin@r device for use in connection with polishing lathes, including a tiltably supported pedestal, a bell crank lever, a support therefor, a link connection between said lever and the pedestal, means cooperating withthe bell crank lever for limiting its movement in one direction, a lever for actuating said bell crank lever to swing the pedestal in one direction, a rod anchored adjacent one end and slidably engaged by the pedestal and a spring mounted on the rod for shifting the pedestal after the bell crank lever and link have been moved to a predetermined position.

7. A work holding device for use in connection with polishing lathes, comprising a tiltably mounted pedestal, means for swinging said pedestal, a head mounted for rotation on the pedestal, means for locking said head against rotation, a handle for rotating the head while unlocked, a spindle movable with the head, and means for aetuating the spindle.

8f A work holding device for use in connection with polishing lathes, including a pedestal, means for shifting the pedestal, a head on the pedestal, means for rotating the head, a slide upon the head, a crank revoluble on `the slide, a pitman connected to the head and adjustably connected to the crank, means for rotating the crank to reciprocate the slide, and a spindle carried by theslide.

9. A work holding device for use in connection with polishing lathes, including a movably supported head, means for rotating the head, a slide on thehead, a shaft journaled on the slide, a crank upon the shaft, a pitman connected to the head and adjustably attached to the crank, an operating shaft extending upwardly and carried by the slide, means under the control of the operator for transmitting motion from said upwardly extending shaft to the crank shaft, and means movable with the slide for attachment to the work to be polished.

10. A work holding device for use in connection with polishing lathes, including a head, a slide, an operating shaft journaled in the slide, a crank shaft, upon the slide, means operated by the crank shaft for reciprocating the slide, mechanism for transmitting motion from the operating shaft to the crank shaft, cooperating clutch meinbers for coupling said mechanism to the operating shaft, means for shifting one of the clutch members into and out of engagement with the other clutch member, and means operated by the movement of one of the clutch members for engaging and holding the other clutch member against rotation with the operating shaft.

1l. A work holding device for use in connection with polishing lathes including a spindle, angularly adjustable means for rotating the spindle, a tubular transverse shaft extending at an angle to the spindle, means for transmitting motion from the spindle to said tubular shaft, a suction tube in communication with the tubular shaft and a valve for controlling suction through the shaft.

l2. A work holding device for use in connection with polishing lathes including a spindle angularly adjustable, means for rotating the Spindle in either direction, a` work holding shaft disposed at an angle to the spindle. and means for transmitting motion to said shaft from the spindle.

1?. A work holding device for use in connection with polishing lathes including a head mounted for angular adjustment` a spindle journaled therein, a shaft disposed at an angle to the Spindle, means for creating a suction through the shaft, and means for transmitting motion to the shaft from the spindle.

Lil. rlhe combination with a polishing wheel of a work holding device having a pivotallj,v mounted pedestal, pivotally connected members forming a toggle for normally holding the pedestal from movement towards the said wheel, and means under the control of the operator for shifting the said members to tilt the pedestal toward the wheel.

l5. The combination with a polishing wheel of a work holding device comprisingr a supporting base plate, a base adjust'ablv mounted thereon for lateral morenient towards and away from the said wheel, a tiltable pedestal pivoted to the base, means for limiting the swinging movement of the pedestal towards the wheel, means for selectively swinging the said pedestal towards aud away from the wheel` a head rotatably mounted directly ou the pedestal, a. spindle movable with the head, and means for actuating the spindle.

16. The combination with a polishingr wheel of a work holding device comprising a t-iltable pedestal. a rotatable head mounted directly on the pedestal, means for rotating the head, means for limitingY the movement of the pedestal towards the wheel. means for selectively swinging the pedestal towards and from the wheel, a slide superposed, upon said head, a spindle carried by and movable with the slide, means for rotatingthe spindle, and operative connections between the last-named means and the said head for reciprocating the slide superposed upon the head.

l?. rlhe combination with a polishing wheel of a work holding device comprising a pedestal, means for moving the pedestal towards and from the wheel, a rotatable head on the pedestal, means for rotating the head, a slide carried by the head, a revoluble crank on the slide, a pitman having its opposite extremities operatively connected to the crank and said head, a spindle carried by the slide, and means carried by said slide for rotating the crank to reciprocate the slide, and operative connections between the lastnamed means and the spindle for rotating the same.

18. The combination with a polishing wheel of a work holding device comprising a base, a hollow pedestal tiltably mounted thereon, a circular rack adjacent the upper portion of the pedestal, a rotatable head journaled in the bore of the pedestal, means carried by the head and operatively engaging the rack :for locking' the head against angular movement with respect to the pedestal, a slide mounted on the head, a spindle carried by the slide, and means mounted upon and carried by the slide Jfor rotatingthe spindle, and operative connections between the first-named means and head lor reciprocating the slide.

19. The combination with a polishing wheel of a work holding' device comprising' a base, a pedestal tiltably attached thereto, a slide mounted on the pedestal, a gear housingcarried by the slide, said housingconsisting of a lower section and an upper section super-posed thereon, the upper section being' operatively connected to the lower section and angularly adjustable with respect thereto, a driving shaft extending` through both said sections and around which the upper section is revoluble, a rotatable spindie journaled in and bodily movable with the upper section, operative connections between the driving sha'lt and said spindle, and operative connections between said shaft and the pedestal 'for reciprocating the slide.

20. The combination with a polishingwheel of a work holding device comprising,` a pedestal, a rotatable head mounted thereon, a. reciprocatingj)` slide slidable on the said head, a gear housing carried by the slide, said housing consisting` ot a lower' section and an upper section, the lower section be ing provided with a circular opening at its top, a circular boss on the upper section fitting within the said opening whereby to render the sections adjustable angularly with respect to each other, means for selectively locking,` the sections against relative movement, a driving` shait extending through both said sections and passing` through the said boss, a spindle journaled in the upper section and disposed in vertical alignment with the said pedestal, operative connections between the driving` shaft and spindle, and means operatively connecting the said shaft and head to reciprocatev the slide.

ln testimony that I claim the ilforegoiiiig as my own, l have hereto aiiixed my si natu re in the presence ot two witnesses.

ROBERT F. SALISBUR-Y lVitnesses Jos. T. lVmNzinnL, JOHN D. MA'rTsoN. 

